Wire-coiler



(ModeL)` Wire Ooiler. v No, 231,093. V VPa'ten'teol Aug. 10,1880.

?nanma WWW UNITED STATES PATENT OinncE TREAT T. PROSSER, OF OHIOAGO', ILLINOIS.

WIRE-COILER.

SPECIFIGATION forming part of Letters Patent No. 231,093, dated August 10, 1880.

Application filed May 6, 1880.

To all whom 'it may concern:

Be it known that I, TREAT T. PRossER, a citizen of the United States, residing at Ohicago, in the connty of Cook and State of Illinois7 have invented certain new and useful Improvementsin Wire-Coilers; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to whicl it appertains to make and use the same, reference being had to the accompanyin g drawings7 and to letters or fi gures of reference m arked thereon, which form a part of this specification.

This in vention relates to devices for converting straight wire into spiral wire by the action of a fixed coiler or spiral-ibrmer through which the wire is pushed by feed-rolls, and which is composed of a spirally-grooved core tixed and snugly fitting in a stationary tube.

My invention consists in constructing the core with two or more spiral grooves to adapt it for forning spirals dift'ering in pitch.

In the annexed drawings, Figure 1 is aperspective view of my improved spiral-former. Fig. 2 is an axial section of the same. Fig. 3 illustrates the grooved -surface of the core projected upon a pla-ne7 the grooves being of different pitch.

The same letters of reference are used in all the fignres in the designation of like parts.

A refers to the tube of the spiral-forner, which is to be held stationary and in proper relation to a tube-guide, through whiel the wire is pnshed by a pair of feed-rolls into the spiral-former, in manner well understood by those skilled in the art.

B refers to the core of the spiral-former, and is composed of a short solid pln g having spiral grooves in its surface, and snngly fitted in one end of the tube A7 where it is held iixed by means of a set-screw, so that it may be adjusted in the tube to change the line of wear on the tube.

Fig. 3 represents the surface of a core the grooves in which are of different pitch, so that (Model.)

it may at different times form spirals differing in piteh. It is not deemed eXpedient to have the grooves cross one another, because such a Construction would render the operation of the formerrather nncertain, and might, under some circumstances, render it wholly impractieable. Hence the core is made so slort that the longest groove-that is, the one of least pitchshall have only about one turn around the core. The grooves may thus be all independent of one another, although it is not objeetionable to have the discharge ends of two or more grooves meet, as indicated in Fig. 3.

Each groove in the core B may differ in diameter from the others, in order to adapt one core to form spirals in different numbered or sized wires.

The tube A exeeeds the core in length to a considerable eXtent, so as to support and guide the newly-formed spirals for a distance of several turns. The elongated portion of the tube has a borc exceeding in diameter that of the core, to adnit of the expansion of the newly-formcd spirals, and th us reduce friction.

I- do not herein elaim a spiral-forner composed of a short spirally-grooved core and an elongated tube having a borc in its elongated portion exceeding the diameter of the core, as this feature is claimed in another application for a patent filed by me of even date with the application for this patent; but

What l elaim herein as new is- A spiral-former for making spiral wire, composed of a tube and a short core fitted therein, the core being provided with two or more independent non-intersecting spiral grooves of different pitch7 substantially as before set forth.

In testimony whereof I affix my Signature in presence of two witnesses.

TREAT T. PRossnn.

Y/Vitnesses:

I-l'. B. PRossER, H. W. ANDERsoN. 

